- Within a week of your first visit to the BRTC, you will complete 2 online "24-hour diet recalls", 1 during a weekday and the other on a weekend day. One of the diet recalls will be done during your first visit to the BRTC and the other will be done at your home. This involves completing an online questionnaire that asks about what you eat and drink. You will report everything you have consumed in the last 24 hours (from midnight to midnight). A study staff member will call you and tell you when to complete each 24-hour diet recall. Each phone call should last no longer than about 5 minutes, depending on if you have any questions for the study staff member.